213100019 has 4 divisors (see below), whose sum is σ = 232472760. Its totient is φ = 193727280.

The previous prime is 213100009. The next prime is 213100061. The reversal of 213100019 is 910001312.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 213100019 - 2²⁰ = 212051443 is a prime.

It is a super-2 number, since 2×213100019² = 90823236195600722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213100009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9686354 + ... + 9686375.

It is an arithmetic number, because the mean of its divisors is an integer number (58118190).

Almost surely, 2^213100019 is an apocalyptic number.

213100019 is a deficient number, since it is larger than the sum of its proper divisors (19372741).

213100019 is a wasteful number, since it uses less digits than its factorization.

213100019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19372740.

The product of its (nonzero) digits is 54, while the sum is 17.

The square root of 213100019 is about 14597.9457116404. The cubic root of 213100019 is about 597.3027250907.

The spelling of 213100019 in words is "two hundred thirteen million, one hundred thousand, nineteen".